Warp stop-motion for looms.



Nu. 657,1);94. Patented Sept. 4, I900. R. CRUMPTON.

WARP STOP MOTION FOR LODMS.

(Application filed Apr. 23, 1900.)

(No Model.)

WITNEEEJE/E. INVENTDR.

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RANDOLPH OROMPTON, OF WORCESTER, MASSACHUSETTS, ASSIGNOR TO THE CROMPTON & KNOWVLES LOOM WORKS, OF SAME PLACE.

WARP STOP-MOTION FOR LOOMS.

SBIECIFIGATION forming part of Letters Patent No. 657,094, dated September 4, 1900.

Application filed April 23, 1900.

To (tZZ whom, it may concern:

Be it known that I, RANDOLPH CRoMPToN, a citizen of the United States, residing at Worcester, in the county of Worcester and State of Massachusetts, have invented certain new and useful Improvements in l/Varp Stop- Motions for Looms, of which the following is a specification.

My invention relates to warp stop-motions for looms of the class shown and described in my United States Letters Patent No. 643,402, of February 13, 1000, in which the drop devices or detectors are so located with reference to the warp-threads as not to rise and fall with the harnesses and are independent of the shedding mechanism.

The object of my invention is to modify the construction of the drop devices shown in said patent and to combine therewith a trans" verse bar extending through the elongated openings in the drop devices and having its upper edge serrated or toothed and a second transverse bar with a plain upper edge, one of said bars being vertically adjustable.

My invention consists in certain novel features of construction of my improvements, as will be hereinafter fully described.

Referring to the drawings, Figure 1 is a sectional view of a warp stop-motion dropdevice mechanism embodying my improvements; and Fig. 2 is a front or face view of the stationary and adjustable transverse bars, showing the adjustable bar in its lowered po sition at the left and in its raised position at the right.

In the accompanying drawings, 1 is a stand or casting provided with lips or ears 2 2 and 3 3. To the ears 2 2 are secured by screws 4. the ends of two parallel transverse bars 5 5, extending across the loom and directly under the warp-threads 15, which rest and are supported on said bars, as shown.

Extending under the bars 5 5 are two parallel transverse bars 6 6, secured at their ends by screws 7 to the ears 3 3 on the stand 1. The bars 6 6 have along their lower inner sides an angular or ti-shaped projection 6".

Between the two sets of transverse bars 5 5 and 6 6 there are in this instance two sets of drop devices 8, extending in a vertical plane. Each drop device 8 has in this instance a cir- Serial No. 13,834. (No model.)

cular hole or perforation S therein, as a warpeye, through which a warp-thread 15 passes to support the drop device in its normal position, and also an elongated opening or perforation 8 therein, through which in this instance two transverse guide-bars 9 and 10 extend. The guide-bar 9 is secured at its ends to plates 20 (see Fig. 2) on the stands 1 and has a serrated or toothed upper edge formed of a series of separate teeth 9, having openings between them, as shown in Fig. 2, and into each opening a drop device 8 at the upper end of the elongated opening 8 extends when the drop device is in its lowered position, as shown at the right in Fig. 1. The teeth or serrations 9 act to hold the drop devices in position and prevent them from turn-- ing or twisting.

'In connection with the stationary bar 9 I preferably use the adjustable bar 10, which extends transversely through the elongated openings 8" in the drop devices 8 and has an elongated slot 10 at each end through which a screw 11 extends to attach the bar 10 to the bar 9 and to hold it in its adjusted position. The bar 10 is adapted to be lowered, as shown at the left in Fig. 2, to leave the teeth 9 exposed or to be raised, as shown at the right in Fig. 2, to extend on a level with the top of the teeth. The bar 10 is held in its adjusted position by screwing in the screws 11.

Each drop device 8 has on its outer edge, at its lower end, a notch or recess 8", prefer ably of angular shape, as shown, which when the drop device is in its lowered position, as shown at the right in Fig. 1, is adapted to engage and receive the angular projection 6 on the, lower transverse bar 6.

Below the series of drop devices is arranged a vibrating feeler-plate 13, which extends transversely across the 100111 and is secured at each end on an arm 14, fast on a rock-shaft 15, supported in hangers 16 or otherwise. A rocking motion is communicated to the shaft 15 of the vibrating feeler-plate 13 to cause the feeler-plate' to move in a substantiallyhorizontal plane below the drop devices 8 when they are in their normal raised p0sition, as shown at the left in Fig. 1, by mechanism (not shown) in the ordinary way, and connections are made to the shipper device to stop the loom in case themovement of the vibrating feeler-plate 13 is prevented by engagement with one of the 'drop devices 8, if the drop device falls, in case of the breaking of the warp-thread upon which itis supported, as shown at the right in Fig. 1.

It will be understood that the details of construction of my improvements may be varied somewhat, if desired. Only one set of drop devices may be used instead of the two sets shown, and a plain transverse bar extending through the elongated openings 8" in the drop devices, similar to the transverse bar shown in my patent above referred to, may be used instead of the two transverse bars shown in the drawings and abovedescribed. Theshape of the drop device and thearrangement of the openings therethrough may be varied, if desired. The serrated edge bar 9 may be made adjustable, and the bar 10 stationary, if preferred.

Having thus described my invention, what Iclaim as new, and desire to secure by Letters Patent, is-

1. In a warp stop-motion for looms, the combination with a series of drop devices, supported in their normal position by the warp threads, and each device having a recess in one of its vertical edges, of a vibrating feelerplate to engage the drop device when in its lowered position, and a transverse bar havin g a projection thereon to enter the recess in the drop device when in its lowered position, submechanism, each device provided with an elongated opening, and a warp-eye, and an angular recess in one edge, in combination with a transverse guiding-bar passing through the elongated opening, a vibrating feelerpiate to engage the drop device when in its lowered position, and atransverse bar having an angular projection thereon to extend into the angular recess in the drop device, substantially as shown and described.

3. In a warp stop-motion forlooms, the combination with a series of drop devices, supported in their normal position by the warpthreads, and each device having an elongated opening therethrough, of a transverse guiding-bar having a toothed or serrated upper edge, extending through the elongated opening, and one or more adjustable bars also extendingthrough said opening,substantially as shown and described.

RANDOLPH OROMPTON.

Vitnesses:

J. O. DEWEY, M. HAAS. 

